Pretty much what Tracy said. Find a safe place to stash the archives, of course, maybe a cloud drive or external media of some kind since a local PC hard drive always has the risk of you changing computer and forgetting to move the data over.
How are FB groups these days? I bailed from anything to do with Meta years ago now but at the time, FB groups still were not as usable for me as a good forum.
Well as you are currently hosting with me, you could have just asked for a cPanel backup of the site creating, which I would have provided you prior to it being deleted at the end of the current billing period.
I understand the problem with online communities in light of social networks. But Facebook is not remotely a replacement. There are minimal controls, and jumping from thread to thread to look at discussions isn't convenient. It's unfortunate, and I imagine providers of traditional online communities, such as XenForo, are suffering.